EP2632626A2 - Joining a first component to a second component by means of one-sided resistance spot welding - Google Patents
Joining a first component to a second component by means of one-sided resistance spot weldingInfo
- Publication number
- EP2632626A2 EP2632626A2 EP11764686.9A EP11764686A EP2632626A2 EP 2632626 A2 EP2632626 A2 EP 2632626A2 EP 11764686 A EP11764686 A EP 11764686A EP 2632626 A2 EP2632626 A2 EP 2632626A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- components
- welding
- component
- resistance
- band
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000003466 welding Methods 0.000 title claims abstract description 144
- 238000005304 joining Methods 0.000 title claims abstract description 15
- 238000000034 method Methods 0.000 claims abstract description 35
- 238000003825 pressing Methods 0.000 claims abstract description 14
- 125000006850 spacer group Chemical group 0.000 claims description 24
- 238000002844 melting Methods 0.000 claims description 9
- 230000008018 melting Effects 0.000 claims description 9
- 238000013459 approach Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000001939 inductive effect Effects 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229920001169 thermoplastic Polymers 0.000 description 2
- 239000004416 thermosoftening plastic Substances 0.000 description 2
- 241001059810 Cantharellula umbonata Species 0.000 description 1
- 241001469893 Oxyzygonectes dovii Species 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000004021 metal welding Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/10—Spot welding; Stitch welding
- B23K11/11—Spot welding
Definitions
- the invention relates to a method and a welding device according to the method for joining a first component to a second component by means of a one-sided
- Resistance spot welding is known. It can be joined together electrically conductive and fusible components.
- a welding electrode in an electrically conductive one-sided to one of the components is known.
- WO 2004/087360 A1 discloses a one-sided resistance spot welding of metal sheets, in which a current path and an electrode force are concentrated in the region of a hump in a top sheet.
- DE 199 47 206 B4 relates to a method for connecting two components, in particular on a motor vehicle, by projection welding, in which a component has at least one raised weld boss, which bears in a welding zone, preferably a spot welding zone, with a contact point on the other component, wherein the weld hump has a hump base with a base surface forming the abutment surface, wherein in the base surface a raised hump structure is embossed with a plurality of projection projections, wherein the weld hump melts from the humpback structure as the current passes through the weld zone and a preferably thin melt layer is formed on the other component so that the two components after their compression in the weld zone form a component connection without surface damage.
- DE 10 2009 023 792 A1 relates to a joining method for a stack of three metal sheets, which is carried out using only a single welding step, wherein access to only one side of the plate is required.
- An inner plate of the stack has a pair of forked humps formed therein, at least a first apex facing in one direction and at least a second apex facing in the opposite direction.
- Sheet metal is assembled to the inner panel with the first outer panel abutting the at least one first vertex and the second outer panel abutting the at least one second vertex.
- a projection welder welds the plates with the help of a Accessing only the first outer plate overlying the bifurcated bosses, with a majority of the current flowing through the second outer plate.
- the object of the invention is to enable an improved joining of a first component to a second component by means of a one-sided resistance spot welding, in particular to improve a concentration of a welding current in a region of a resistance point of the one-sided resistance spot welding.
- the object is in a method for joining a first component to a second component by means of a one-sided resistance spot welding, with establishing a distance between the first component and the second component in the region of a resistance point of the
- Resistance point welding by means of a spacer, one-sided pressing a welding electrode on the region of the resistance point while approaching the components for locally producing an electrically conductive contact contact between the
- the two components are initially arranged at a distance from one another.
- the two components are initially arranged at a distance from one another.
- the electrical welding current can be guided on one side between the welding electrode and the dummy electrode through the components, wherein the welding current in the region of
- Resistance point can be concentrated advantageous.
- Distance holding device has at least one projection of at least one of the components.
- one of the components may have the projection of the spacer device, wherein advantageously no separate spacer device must be positioned relative to the components. Rather, the spacer device can be attached directly to a manufacturing process of the corresponding component with this. It is advantageously possible to carry out the spacer device in one piece with the relevant component. Alternatively and / or additionally, the spacer device can be attached separately to the corresponding component, in particular during a production process. It is conceivable that the separately mounted spacer device has insulating properties.
- Another embodiment of the method is performed by inserting an insulating tape of the spacer between the components for making the gap.
- the two components by means of the introduced insulating tape simultaneously spaced from each other and electrically isolated from each other.
- the insulating tape has a recess in the region of the resistance point.
- the two components in the region of the recess of the insulating tape by the pressing of the welding electrode can be so far approached to each other that they touch and thereby the welding current can flow.
- a further embodiment of the method is carried out with introduction of the insulating tape and at a distance therefrom, in particular parallel spaced, of a further insulating tape for producing the spacing, the resistance point lying between the insulating tapes.
- the components can be spaced next to the resistance point by means of the two insulating strips and arranged electrically isolated from each other.
- the actual welding process ie the approach of the components by the pressing of the welding electrode and the introduction of the welding current, can advantageously take place between the insulating tapes.
- the liquefied insulating tape can be displaced during pressing of the welding electrode, so that in the region of
- a further embodiment of the method is carried out by introducing the preheating current via a fixing point which electrically contacts the components.
- the preheating be passed over the fixing point.
- the components can be prefixed by means of the fixing point in a position relative to each other. Alternatively and / or additionally, it is conceivable that the method for several
- the preheating current can be passed over existing welding points, wherein the preheating current. for the first time over the fixation point and then over already made welding points flows.
- an electrical resistance of the conductive band can be set so that it is comparatively strongly heated due to the preheating current and thereby melted. It is advantageous for a first-time production of a welding point no fixing point for introducing the preheating current necessary. Rather, this can be made directly on the electrically conductive tape.
- the molten by means of the preheating current electrically conductive tape can advantageously by the pressing of the
- Resistance point are displaced, so that the welding current can flow.
- the task is also in a welding apparatus for one-sided
- Figure 1 is a schematic side view of a partially illustrated welding device for one-sided resistance spot welding together with two spaced-apart components.
- FIG. 2 shows the welding apparatus shown in FIG. 1, wherein the two components are locally approximated to one another in the region of a resistance point for producing an electrically conductive contact contact;
- Fig. 3 is a schematic plan view of the area of the resistance point of the two components shown in Figs. 1 and 2;
- 4 - 7 are each a schematic plan view of two for performing the one-sided
- Resistance spot welding prepared components which are spaced by a band to each other;
- Fig. 8 is a schematic side view of that shown in Figs. 1 and 2
- Welding device wherein, in contrast, the two components are spaced from each other analogously to the figures 4 to 7 by means of a band; the welding device shown in Figure 8, wherein the tape is melted and the, distance of the components in the region of the resistance point is reduced to 0;
- Figure 1 shows a schematic side view of only partially shown
- the welding device 1 has a welding electrode 3 and a dummy electrode 5. Between the welding electrode 3 and the dummy electrode 5, a voltage for inducing a preheating current and / or a welding current for joining a first component 7 and a second component 9 can be applied.
- the first component 7 may, for example, be a top plate and the second component 9 may be a bottom plate.
- the components 7 and 9 may be components, in particular body parts, of a motor vehicle.
- Welding electrode 3 and the dummy electrode 5 are from the same side to the components 7 and 9th attached or attachable or electrically contacted or contacted with these.
- the components 7 and 9 are arranged in the region of a resistance point 11 at a distance 13 from each other.
- the components 7 and 9 are, in particular, planar components which, in the prepared relative position to each other shown in FIG. 1, have the spacing 13 from each other.
- the components 7 and 9 may also be curved components which have the spacing 13, in particular in the region of the resistance point 11.
- the distance 13 is made by means of a spacer device 15.
- Spacer device 15 has projections 17, which are integrally connected to the first component 7.
- the projections 17 may be integrally connected to the second component 9.
- the projections 17 of the spacer device 15 may be designed as separate components, which are arranged, for example, for preparing the resistance spot welding between the components 7 and 9 for producing the distance 13.
- FIG. 2 shows the welding apparatus shown in FIG. 1 during a welding operation for performing resistance spot welding.
- the welding electrode 3 is pressed with a contact force against the first component 7.
- the contact force and its direction is symbolized in Fig. 2 by means of an arrow 19.
- the first component 7 is elastically deformed so that it has a curvature.
- the distance 13 is reduced to a value of 0, so that the first component 7 and the second component 9 are in an electrically conductive contact with each other.
- a welding current (not shown) can flow from the welding electrode 3 via the first component 7, the second component 9 to the dummy electrode 5.
- the resistance point 11 of the components 7 and 9 is advantageously melted, so that for joining the components 7 and 9 a
- Resistance point 11 are concentrated, so that the weld nugget on the first component 7 and the second component 9 can form.
- a shunt forms, which causes a side stream.
- this is advantageous so small that thereby the actual welding process is not affected.
- a means of the Welding device 1 generated current flow are increased by the electric current flowing through the shunt.
- FIG. 3 shows a plan view of the two components 7 and 9 shown in FIGS. 1 and 2. It can be seen the resistance point 11, which is symbolized in Fig. 3 by means of a circle.
- the resistance point 11 can also be referred to as a welding zone, in which forms the necessary to join the components 7 and 9 nugget.
- the first component 7 and the second component 9 overlap in an overlapping zone 21, which is symbolized by means of a double arrow and dashed lines in FIG.
- the overlapping zone 21 may, for example, be between 10 and 30 mm, in particular between 12 and 20 mm, in particular approximately 16 mm.
- the spacer device 15 has a total of four trapezoidally arranged projections 17, which can also be referred to as a distance hump.
- Resistance point 11 is arranged, which flows through this only one insufficient for welding side stream.
- these provide only the distance 13 between the components 7 and 9 forth, which advantageously remains outside the resistance point 1, so that advantageously takes place only on the projections 17 of the spacer 15 and the resistance point 11 itself, an electric current flow.
- the welding current required for welding the components 7 and 9 can advantageously be concentrated in the resistance point 11 of the components 7 and 9.
- FIGS. 4 to 7 each show a schematic plan view of two components 7 and 9 arranged at a distance from each other, which can be joined by means of the welding device 1, analogously to the representation of FIG. 3.
- the components 7 and 9 according to the representation of FIG 4 - 6 each have a plurality of resistance points 11 and are each spaced apart by means of a band 23.
- the band 23 shown in FIG. 4 is arranged between the components 7 and 9 and has recesses 25 in the region of the resistance points 11.
- the recesses 25 are executed as an example round according to the illustration of FIG. 4.
- the recesses 25 may also have a different geometric shape, for example square and / or the like.
- the components 7 and 9 during the resistance spot welding through the recesses 25 can be locally approximated each other in the region of the respective resistance point 11, wherein advantageous to the respective resistance point 11 surrounding the insulating effect of the belt 23 is maintained.
- FIG. 5 shows a further exemplary embodiment, wherein the band 23 is made narrower so that it covers, for example, approximately only 1/3 of the overlapping zone 21.
- another band 27 Spaced to the narrower band 23, another band 27 is arranged.
- the bands 23 and 27 are arranged parallel to one another and at a distance from one another in the region of the overlapping zone 21.
- between the bands 23 and 27 remains in the region of
- Resistance points 11, a free space, the components 7 and 9 are arranged spaced from each other before performing the resistance point welding, leaving in the space of the distance 13 a surmountable air space, which can be reduced by the pressing of the welding electrode 3 to a distance of 0, so that the components 7 and 9 touch each other at the respective resistance point 11 for establishing the electrical contact.
- the electrically insulating effect of the bands 23 and 27 and electrical insulation due to the remaining air space advantageously remains surrounding the resistance point 11, so that advantageously the welding current of the resistance spot welding can be concentrated in the respective resistance point 11.
- FIG. 6 shows a further embodiment of the welding apparatus 1, wherein, in contrast, the band 23 has no recesses 25.
- the band 23 according to the illustration of FIG. 6 has thermoplastic properties and can be melted by heating.
- the components 7 and 9 are electrically connected to one another by means of an electrically conductive fixing point 29.
- a preheating current for melting the band 23 in the region of the resistance point 11 into the components 7 and 9 can be introduced via the fixing point 29.
- the molten strip 23 is displaced locally, so that in the region of the resistance point 1 1, an electrically conductive contact between the components 7 and 9 can be made.
- the molten strip 23 also in the liquid state electrically insulating properties, so that advantageously the electric welding current can be concentrated in the region of the resistance point 11.
- the band 23 is not provided, or ends adjacent thereto.
- a band 23 with electrically conductive properties is arranged between the components 7 and 9.
- the electrically conductive belt 23 In the overlap zone 21 is thus between the components 7 and 9, the electrically conductive belt 23, wherein advantageously over this the Preheating can be performed.
- the electrically conductive band 23 according to the representation 7 has no recesses, that is, it is arranged continuously in the overlapping zone 21 between the components 7 and 9 for producing the spacing 13.
- the band 23 has insulating properties and also with
- Components 7 and 9 is arranged, according to the illustration of FIG. 7, no fixing point 29 is required. Rather, advantageously, the preheating on the electrically conductive
- the electrically conductive tape 23 may also have thermoplastic properties and is meltable. The electrically conductive properties can be adjusted so that a reliable heating of the belt 23 according to FIG. 7 results when passing the preheating current. Analogously to the above-described procedure, the electrically conductive strip can also be melted so that it can be locally displaced in the region of the resistance point 11 for producing the electrical contact contact between the components 7 and 9 when the white-eye electrode 3 is pressed on.
- FIG. 9 This process is illustrated in FIG. 9, wherein the first component 7 is deformed by the pressing-on of the welding electrode 3, so that the first component 7 approaches the second component 9 locally in the region of the resistance point 11 while displacing the band 23.
- FIG. 9 shows in principle the displacement of the molten strip 23 analogous to Figs. 6 and 7. Analogously, but optionally without the need of
- FIG. 8 shows the schematic side view of the welding device 1 of FIG. 9.
- FIG. 8 shows that between the components 7 and 9 the strip 23 for producing the spacing 13 is arranged.
- the belt 23 constitutes an insulating layer.
- the belt 23 has electrically conductive properties and can convert a preheating current directly into a reflow.
- Fig. 10 shows a schematic view of two components 7 and 9 together with a
- FIG. 11 shows the sectional view of the components 7 and 9 shown in FIG. 10 together with the welding electrode 3 and the dummy electrode 5.
- the distance 13 in FIG. 11 is already due to the pressing of the welding electrode 3 0, so that the components 7 and 9 are in the region of the resistance point 11 in an electrically conductive contact. It can be seen that one about the
- Welding electrode 3 and the dummy electrode 5 total current 35 divided into a secondary flow 37 and a welding current 33 split.
- the secondary flow 37 flows over the already
- the welding current 33 which is substantially larger, flows over the lying below the welding electrode 3 resistance point 11 and leads to
- the total current 35 flows as preheating current 31 via the fixing point 29 or the already established resistance point 11, ie it represents the preheating current 31 or is identical to these.
- the distance bumps of the spacer device 15 are advantageously provided.
- no additional pad is necessary to arrange the components 7 and 9 in the distance 13 to each other.
- the spacer device 15 may have the band 23 or the further band 27 shown in FIGS. 4-7.
- the welding current 33 can thus be concentrated in the resistance point 11 in such a way that more advantageous process windows or larger process windows result and / or certain combinations of materials of the components 7 and 9 by means of the
- the projections 17 or distance hump of the spacer device 15 can be embossed into the first component 7, so that an insulating air gap of the distance 13 between the components 7 and 9, in particular sheets, can be produced.
- Electrodes 3 and 5 are advantageously positioned at a suitable location, at the resistance point 11 located between the protrusions 17 of the spacer device 15.
- the electrode force of the welding electrode 3 shown by means of the arrow 9 deforms the first component 7, this region being pressed in an electrically conductive manner onto the second component 9, whereby the circuit for inducing the welding current 33 is closed.
- Advantageous can be compensated with an increased welding current 33, a shunt current across the projections 17 of the spacer 15, but this is advantageous in comparison to a direct contact contact of the components 7 and 9 so low that in the region of the resistance point 11, the joining of the components 7 and 9 can be done in a safe and easy way.
- the projections 17 of the spacer device 15 can be designed as a pointed round hump, which advantageously results in a high contact resistance, wherein advantageously the secondary flow 37 or shunt current can be kept low.
- the spacer device 15 with the projections 17 is advantageously used only for producing the distance 13, that is, has no function with respect to a heat conduction during the resistance spot welding. As shown in FIGS. 1 and 2, almost the entire total current 35 flows in the form of the welding current 33 over the
- Resistance point 11 Advantageously, a stable welding process with comparatively thick components 7 and 9 can thereby be realized.
- Distance holder 15 may be varied as desired.
- An advantageous trapezoidal arrangement of a total of 4 Distanzbuckeln and a width of 16 mm of the overlapping zone 21 has been found.
- the distance holder 15 may be varied as desired.
- An advantageous trapezoidal arrangement of a total of 4 Distanzbuckeln and a width of 16 mm of the overlapping zone 21 has been found.
- the width of 16 mm of the overlapping zone 21 has been found.
- Welding device 1 have a welding control for controlling the welding current 33.
- the band 23 and / or the further band 27 can be designed as adhesive tape according to the representations of FIGS. 4-7, this being applied in a preparatory step in a simple manner to one of the components 7 and 9 can be glued on.
- the band 23 and / or the further band 27 has adhesively adhesive properties, so that this in addition to the joining by means of
- the distance between the band 23 and the further band can be approximately 5 to 30 mm, in particular 10 to 20 mm, preferably approximately 15 mm.
- the welding electrode 3 can be positioned in the middle, that is to say between the band 33 and the further band 27, so that as a result of the contact force of the band
- Welding electrode 3 which is symbolized by the arrow 19, a deformation force acting on the first component 7 so that the components 7 and 9 between the belt 23 and the other band 27 to a distance 13 of 0 approach each other.
- This is advantageous the components 7 and 9 so far approximated to each other that a possible shunt only over already established resistance points 11, as shown in Fig. 1 1, takes place.
- the welding current 33 which is a predominant proportion of the
- Total current 35 passed over the resistance point 11 or concentrated in this.
- the majority of the total current 35 in the form of the welding current 33 is passed directly below the welding electrode 3 for joining the components 7 and 9 through it.
- welding electrode 3 done.
- the band 23 is first melted, so that it can be displaced to produce the electrically conductive contact contact with deformation of the first component 7.
- a sufficient amount of heat can be generated in the region of the welding electrode 3, so that the tape 23 melts.
- the welding point 29 is first used to conduct the
- Preheating current 31 set. Thereafter, a first welding point on a first
- Resistance point 11 are set. Further welding points at further resistance points 11 can be preheated by means of the already set adjacent resistance points 11.
- the preheating takes place without fixing point 29 due to the electrically conductive property of the strip 23.
- Resistance points 11 are selected by simply pressing the welding electrode 3 at any point. On recesses 25 analogous to the representation of FIGS. 4 and 5, no consideration must be taken. As a result, in particular different distances between the resistance points 11, zigzag arrangements and / or the like are conceivable.
- a welding control can be used.
- the total current 35 first flows as a preheating current 31 via an adjacent welding spot already produced and serves to heat and melt the strip 23, that is to say the insulating layer between the components 7 and 9.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Resistance Welding (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102010049865A DE102010049865A1 (en) | 2010-10-28 | 2010-10-28 | Joining a first component with a second component by means of a one-sided resistance spot welding |
PCT/EP2011/004938 WO2012055475A2 (en) | 2010-10-28 | 2011-10-04 | Joining a first component to a second component by means of one-sided resistance spot welding |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2632626A2 true EP2632626A2 (en) | 2013-09-04 |
EP2632626B1 EP2632626B1 (en) | 2018-12-12 |
Family
ID=44759650
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11764686.9A Active EP2632626B1 (en) | 2010-10-28 | 2011-10-04 | Joining a first component to a second component by means of one-sided resistance spot welding |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2632626B1 (en) |
DE (1) | DE102010049865A1 (en) |
WO (1) | WO2012055475A2 (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102013213109A1 (en) | 2013-07-04 | 2015-01-22 | Ford Global Technologies, Llc | Method for the permanent connection of components or component areas as well as permanent connection |
DE102013213110B4 (en) * | 2013-07-04 | 2023-03-09 | Ford Global Technologies, Llc (N.D.Ges.D. Staates Delaware) | Process for the non-detachable connection of components or component areas as well as non-detachable connection |
DE102014019012A1 (en) | 2014-12-18 | 2015-06-25 | Daimler Ag | Arrangement for joining a first component with a second component |
CN105108291A (en) * | 2015-08-12 | 2015-12-02 | 台州市路桥舜力车业有限公司 | Manpower and electric dual-power tricycle manufacturing device and manufacturing method |
DE102019131093A1 (en) * | 2019-11-18 | 2021-05-20 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Welding process and welding device |
DE102020108807A1 (en) | 2020-03-31 | 2021-09-30 | Audi Aktiengesellschaft | Method for joining two components |
CN114734131A (en) * | 2022-03-30 | 2022-07-12 | 天津大学 | Resistance spot welding butt joint process |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1814801A1 (en) * | 1966-09-21 | 1970-09-17 | Becker Dr Otto Alfred | Resistance welding and soldering of coated - sheet metal |
US3768148A (en) * | 1971-12-17 | 1973-10-30 | Gen Electric | Method of joining print characters to high speed printer fingers |
DE2342575A1 (en) * | 1973-08-23 | 1975-03-06 | Volkswagenwerk Ag | Electric resistance welding of metal sheets - where small bulges are pressed in one sheet prior to welding |
JPS61115687A (en) * | 1984-11-10 | 1986-06-03 | Kobe Steel Ltd | Welding method of composite material |
JPS61202821A (en) * | 1985-03-06 | 1986-09-08 | Mazda Motor Corp | Joining method for plate material provided with laminated veneer |
JPH0278541A (en) * | 1988-06-29 | 1990-03-19 | Kawasaki Steel Corp | Composite metal sheet |
DE19947206B4 (en) | 1999-10-01 | 2004-05-13 | Audi Ag | Method for connecting two components, in particular on a motor vehicle, by projection welding |
JP3753005B2 (en) * | 2000-12-06 | 2006-03-08 | トヨタ車体株式会社 | Series spot welding method |
KR20050002814A (en) | 2003-03-31 | 2005-01-10 | 미쓰비시덴키 가부시키가이샤 | Projection welding apparatus and projection welding method |
US7429713B2 (en) * | 2006-01-27 | 2008-09-30 | Gm Global Technology Operations, Inc. | Method for improving single sided resistance spot welds |
DE102007063432A1 (en) * | 2007-12-19 | 2009-06-25 | Volkswagen Ag | Welding head for a spot welding machine has a variable structure depending on whether two ore more welding electrodes are assigned to the welding head to weld together panels during spot welding |
DE102008047800B4 (en) * | 2008-05-09 | 2021-11-18 | Fft Produktionssysteme Gmbh & Co. Kg | Method and tool for producing a fixing connection on positively joined components |
US9180548B2 (en) | 2008-06-06 | 2015-11-10 | GM Global Technology Operations LLC | Method for one-sided, one step joining of a metal sheet stack |
-
2010
- 2010-10-28 DE DE102010049865A patent/DE102010049865A1/en not_active Withdrawn
-
2011
- 2011-10-04 EP EP11764686.9A patent/EP2632626B1/en active Active
- 2011-10-04 WO PCT/EP2011/004938 patent/WO2012055475A2/en active Application Filing
Non-Patent Citations (1)
Title |
---|
See references of WO2012055475A2 * |
Also Published As
Publication number | Publication date |
---|---|
WO2012055475A2 (en) | 2012-05-03 |
EP2632626B1 (en) | 2018-12-12 |
WO2012055475A3 (en) | 2012-07-05 |
DE102010049865A1 (en) | 2012-05-03 |
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